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tinggi segitiga = √(x² - (x/2)²) <=== rumus pitagoras
= √(x² - x²/4)
= √(4x² - x²)
= √((3/4)x²)
= (x/2)√3
panjang kawat = 66 m = (x/2)√3 + x + x + x
66 = (x/2)√3 + 3x
66 = x((1/2)√3 + 3)
x = 66/((1/2)√3 + 3) ← dirasionalkan
x = (33√3 - 198)/(3/4 - 9)
x = (33√3 - 198)/(-33/4)
x = (33√3 - 198)(-4/33)
x = (-4√3 + 24)
x = 24 - 4√3